From 5d5f73f22f4802ff1cc3a6895d1e6009337b9ffe Mon Sep 17 00:00:00 2001 From: Přemysl Eric Janouch Date: Thu, 15 Jun 2023 11:42:29 +0200 Subject: Don't layout during rendering --- nncmpp.c | 101 +++++++++++++++++++++++++++++---------------------------------- 1 file changed, 46 insertions(+), 55 deletions(-) diff --git a/nncmpp.c b/nncmpp.c index adec1b8..77d126e 100644 --- a/nncmpp.c +++ b/nncmpp.c @@ -1182,9 +1182,6 @@ struct widget; /// Draw a widget on the window typedef void (*widget_render_fn) (struct widget *self); -/// Extract the contents of container widgets -typedef struct widget *(*widget_sublayout_fn) (struct widget *self); - /// A minimal abstraction appropriate for both TUI and GUI widgets. /// Units for the widget's region are frontend-specific. /// Having this as a linked list simplifies layouting and memory management. @@ -1198,7 +1195,7 @@ struct widget int height; ///< Height, initialized by UI methods widget_render_fn on_render; ///< Render callback - widget_sublayout_fn on_sublayout; ///< Optional sublayout callback + struct widget *children; ///< Child widgets of containers chtype attrs; ///< Rendition, in Curses terms short id; ///< Post-layouting identification @@ -1231,6 +1228,23 @@ struct ui bool have_icons; }; +static void +widget_destroy (struct widget *self) +{ + LIST_FOR_EACH (struct widget, w, self->children) + widget_destroy (w); + free (self); +} + +static void +widget_move (struct widget *w, int dx, int dy) +{ + w->x += dx; + w->y += dy; + LIST_FOR_EACH (struct widget, child, w->children) + widget_move (child, dx, dy); +} + /// Replaces negative widths amongst widgets in the sublist by redistributing /// any width remaining after all positive claims are satisfied from "width". /// Also unifies heights to the maximum value of the run, and returns it. @@ -1265,7 +1279,7 @@ widget_redistribute (struct widget *head, int width) int x = 0; LIST_FOR_EACH (struct widget, w, head) { - w->x = x; + widget_move (w, x - w->x, 0); x += w->width; } return max_height; @@ -1801,7 +1815,7 @@ app_append_layout (struct layout *l, struct layout *dest) { // Assuming there is no unclaimed vertical space. LIST_FOR_EACH (struct widget, w, l->head) - w->y = last->y + last->height; + widget_move (w, 0, last->y + last->height - w->y); last->next = l->head; l->head->prev = last; @@ -2176,44 +2190,35 @@ app_layout_row (struct tab *tab, int item_index) return l; } -// XXX: This isn't a very clean design, in that part of layouting -// is done during the rendering stage. -static struct widget * -app_sublayout_list (struct widget *list) +static void +app_layout_view (struct layout *out, int height) { + struct layout l = {}; + struct widget *list = app_push_fill (&l, g.ui->list ()); + list->id = WIDGET_LIST; + list->height = height; + list->width = g.ui_width; + struct tab *tab = g.active_tab; + if ((int) tab->item_count * g.ui_vunit > list->height) + { + struct widget *scrollbar = g.ui->scrollbar (APP_ATTR (SCROLLBAR)); + list->width -= scrollbar->width; + app_push (&l, scrollbar)->id = WIDGET_SCROLLBAR; + } + int to_show = MIN ((int) tab->item_count - tab->item_top, ceil ((double) list->height / g.ui_vunit)); - struct layout l = {}; + struct layout children = {}; for (int row = 0; row < to_show; row++) { int item_index = tab->item_top + row; struct layout subl = app_layout_row (tab, item_index); - app_flush_layout_full (&subl, list->width, &l); - } - LIST_FOR_EACH (struct widget, w, l.head) - { - w->x += list->x; - w->y += list->y; - } - return l.head; -} - -static void -app_layout_view (struct layout *out, int height) -{ - struct layout l = {}; - struct widget *w = app_push_fill (&l, g.ui->list ()); - w->id = WIDGET_LIST; - w->height = height; - - struct tab *tab = g.active_tab; - if ((int) tab->item_count * g.ui_vunit > w->height) - { - app_push (&l, g.ui->scrollbar (APP_ATTR (SCROLLBAR))) - ->id = WIDGET_SCROLLBAR; + // TODO: Change layouting so that we don't need to know list->width. + app_flush_layout_full (&subl, list->width, &children); } + list->children = children.head; app_flush_layout (&l, out); } @@ -2407,7 +2412,7 @@ app_on_refresh (void *user_data) available_height -= bottom.tail->y + bottom.tail->height; LIST_FOR_EACH (struct widget, w, g.widgets.head) - free (w); + widget_destroy (w); g.widgets = (struct layout) {}; app_append_layout (&top, &g.widgets); @@ -2645,7 +2650,7 @@ incremental_search_on_changed (void) LIST_FOR_EACH (struct widget, w, tab->on_item_layout (index).head) { str_append (&s, w->text); - free (w); + widget_destroy (w); } size_t len; @@ -5706,11 +5711,8 @@ tui_make_scrollbar (chtype attrs) static void tui_render_list (struct widget *self) { - LIST_FOR_EACH (struct widget, w, self->on_sublayout (self)) - { + LIST_FOR_EACH (struct widget, w, self->children) w->on_render (w); - free (w); - } } static struct widget * @@ -5720,7 +5722,6 @@ tui_make_list (void) w->width = -1; w->height = g.active_tab->item_count; w->on_render = tui_render_list; - w->on_sublayout = app_sublayout_list; return w; } @@ -6490,11 +6491,8 @@ x11_render_list (struct widget *self) &(XRectangle) { self->x, self->y, self->width, self->height }, 1); x11_render_padding (self); - LIST_FOR_EACH (struct widget, w, self->on_sublayout (self)) - { + LIST_FOR_EACH (struct widget, w, self->children) w->on_render (w); - free (w); - } XftDrawSetClip (g.xft_draw, None); } @@ -6504,7 +6502,6 @@ x11_make_list (void) { struct widget *w = xcalloc (1, sizeof *w + 1); w->on_render = x11_render_list; - w->on_sublayout = app_sublayout_list; return w; } @@ -6782,15 +6779,9 @@ x11_find_text (struct widget *list, int x, int y) if (!target) return NULL; - if (target->on_sublayout) - { - struct widget *sublist = target->on_sublayout (target); - char *result = x11_find_text (sublist, x, y); - LIST_FOR_EACH (struct widget, w, sublist) - free (w); - if (result) - return result; - } + char *result = x11_find_text (target->children, x, y); + if (result) + return result; return xstrdup (target->text); } -- cgit v1.2.3-70-g09d2